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Lucene example source code file (TestMultiMMap.java)
The Lucene TestMultiMMap.java source codepackage org.apache.lucene.store; /** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.File; import java.util.Random; import org.apache.lucene.analysis.MockAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.RandomIndexWriter; import org.apache.lucene.util.LuceneTestCase; import org.apache.lucene.util._TestUtil; /** * Tests MMapDirectory's MultiMMapIndexInput * <p> * Because Java's ByteBuffer uses an int to address the * values, it's necessary to access a file > * Integer.MAX_VALUE in size using multiple byte buffers. */ public class TestMultiMMap extends LuceneTestCase { File workDir; @Override public void setUp() throws Exception { super.setUp(); workDir = _TestUtil.getTempDir("TestMultiMMap"); workDir.mkdirs(); } public void testRandomChunkSizes() throws Exception { for (int i = 0; i < 10*RANDOM_MULTIPLIER; i++) assertChunking(random, _TestUtil.nextInt(random, 20, 100)); } private void assertChunking(Random random, int chunkSize) throws Exception { File path = File.createTempFile("mmap" + chunkSize, "tmp", workDir); path.delete(); path.mkdirs(); MMapDirectory dir = new MMapDirectory(path); dir.setMaxChunkSize(chunkSize); // we will map a lot, try to turn on the unmap hack if (MMapDirectory.UNMAP_SUPPORTED) dir.setUseUnmap(true); RandomIndexWriter writer = new RandomIndexWriter(random, dir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)).setMergePolicy(newLogMergePolicy())); Document doc = new Document(); Field docid = newField("docid", "0", Field.Store.YES, Field.Index.NOT_ANALYZED); Field junk = newField("junk", "", Field.Store.YES, Field.Index.NOT_ANALYZED); doc.add(docid); doc.add(junk); int numDocs = 100; for (int i = 0; i < numDocs; i++) { docid.setValue("" + i); junk.setValue(_TestUtil.randomUnicodeString(random)); writer.addDocument(doc); } IndexReader reader = writer.getReader(); writer.close(); int numAsserts = 100*RANDOM_MULTIPLIER; for (int i = 0; i < numAsserts; i++) { int docID = random.nextInt(numDocs); assertEquals("" + docID, reader.document(docID).get("docid")); } reader.close(); dir.close(); } } Other Lucene examples (source code examples)Here is a short list of links related to this Lucene TestMultiMMap.java source code file: |
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